We’ve compiled a collection of must have Best Addons for Firefox -
Audience – WEB Addicts, Daily Internet users, Developers, Geeks.
Nightly Tester Tools
Useful tools for the nightly tester. Must for Making all extensions work with just any version of Firefox. Check the guide here.
Xmarks (formerly Foxmarks)
Xmarks is the #1 bookmarking add-on. Install it on all your computers to keep your bookmarks and (optionally) passwords backed up and synchronized. Xmarks also helps you uncover the best of the web based on what millions of people are bookmarking.
Easy YouTube Video Downloader
Easiest Youtube video downloader ever, single click direct download buttons for FLV, 3GP, MP4 and HD qualities.
GooglePreview
Inserts preview images (thumbnails) and popularity ranks of web sites into the Google and Yahoo search results pages.
Fission
Fission combines address bar and progress bar (Safari style). This makes the progress bar more visible and allows for a nice visual effect.
IE Tab
IE Tab – an extensionthat lets you add a IE Tab inside Firefox for sites which are incompatible, features: Embedding Internet Explorer in tabs of Mozilla/Firefox…
Download Statusbar
View and manage downloads from a tidy statusbar – without the download window getting in the way of your web browsing.
FireFTP
FireFTP is a free, secure, cross-platform FTP client for Mozilla Firefox which provides easy and intuitive access to FTP servers.
DownThemAll!
The first and only download manager/accelerator built inside Firefox!
Flagfox
Displays a country flag depicting the location of the current website’s server and provides quick access to detailed location and webserver information.
TwitterFox
TwitterFox is a Firefox extension that notifies you of your friends’ status on Twitter.
Shareaholic for Firefox
Shareaholic is the ultimate add-on for the link sharing addict! If you use one or more sites like Facebook, Twitter, Gmail, LinkedIn, etc to share you’ll love having Shareaholic by your side. Shareaholic makes sharing online better, faster & easier.
Cooliris
The Cooliris 3D Wall — Simply the fastest and most stunning way to browse photos and videos from the Web or your desktop. Effortlessly scroll an infinite “3D Wall” of your content from Facebook, Google Images, YouTube, Flickr, and hundreds more.
You can also access these Collections at https://addons.mozilla.org/en-US/firefox/collection/taranfx
